| A30 (803) | A35 (948) | A35 (1098: van) | A35 (848: van) |
Built | 1951-56 | 1956-62 | 1962-66 | 1964-66 |
Power unit | All four cylinder, overhead valve (pushrod) |
| 803cc 49.0cu.in. |
948cc 57.8cu.in. |
1098cc 67.0cu.in. |
848cc 51.7cu.in. |
Bore and Stroke | 2.28x3.0in 58.0x76.2mm |
2.48x3.0in 62.9x76.2mm |
2.54x3.3in 64.6x83.7mm |
2.48x2.69in 62.9x68.3mm |
Max Power (net) | 28bhp @ 4,800rpm |
High Comp: 34bhp @ 4,750rpm Low Comp: 32bhp @ 4,600rpm |
Low Comp: 57bhp @ 3,000rpm |
34bhp @ 5,500rpm |
Max Torque | 40 lb.ft @ 2,200rpm |
High Comp: 48 lb.ft @ 2,000rpm Low Comp: 48 lb.ft @ 2,200rpm |
Low Comp: 57 lb.ft @ 3,000rpm |
Low Comp: 44 lb.ft @ 2,900rpm |
Gearbox | All four speed, floor change; synchromesh on the upper three ratios |
| Smooth case |
Smooth case |
Ribbed case |
Ribbed case |
Gearchange | Direct | Remote | Remote | Remote |
Clutch diameter | 6.25in |
6.25in |
7.25in |
7.25in |
Driveline | All models - open propeller shaft |
Final drive | All hypoid bevel, three quarter floating axle |
Axle Ratio | *7/36 (5.143:1) |
9/41 (4.556:1) |
9/38 (4.222:1) |
8/39 (4.875:1) |
Final drive |
[*AS3 cars to Chassis No. 1018.8/41 (5.125:1); AS3 cars from Chassis No. 1019 and first AS4/A2S4 models. 8/39 (4.875:1); four door AS4 cars from Chassis No. 43898 and two door A2S4 versions from Chassis No. 43849. 8/43 (5.375:1); AV4 van and AP4 Countryman models.] |
Steering |
Steering box and idler system, with transverse track rod and side links to stub axles. Cam Gears worm and peg steering box, 11:1 ratio; less frequently encountered Burman worm and nut unit, 12:1 ratio. 2 1/3 turns, lock to lock. Uprated king pins and stub axles on AV8 models. |
Front Suspension |
Independent; Coil springs with 'A' shaped lower wishbones, plus hydraulic lever arm type shock absorbers, forming the upper suspension links. |
Rear suspension |
Semi-elliptic leaf springs (8 leaves on saloons; 11 leaves on commercials), plus hydraulic lever arm type shock absorbers; anti-roll bar. |
Brakes |
Lockheed system; fully hydraulic at front (twin leading shoe type); hydro-mechanical at rear, with master cylinder mounted beneath driver's side floor pan. Footbrake operation of rear brakes by means of single, underfloor-mounted slave cylinder and a rod/cable linkage to expanders mounted on rear backplates. Handbrake operation on rear brakes by means of direct-acting rod/cable system. |
Wheels |
Pressed steel, incorporating ventilation slots; four stud holes 4" PCD (but earliest AS3 models featured wheels secured by bolts onto hub assemblies). |
Tyres |
Saloons; 5.20x13 cross-ply; A35 Countryman models and Commercials, 5.60x13 cross-ply (A30 van and Countryman, 5.90x13). (Note: Many examples today fitted with radial ply tyres, either 145x13 or 155x13, giving significant grip and handling benefits, especially in slippery road conditions). |
© Derived from Accessible Classics Vol.1: Austin A30/35 by Kim Henson.